Improvement in galvanic clocks



NLG. FARMER.

Electric Clock.

No` 9,279. Patented Sept .21, 1852.

/ l4 v l &\\\\\\\\\\\\\\\\\\\\\\1 UNITED .STATES PATENT ',OrFIcE.,

-Moses G. FARMER, oF sALjn'M, MASSACHUSETTS,

IMPROVEMENT IN GA-LVANI'C- CLOCKS.

Specification forming part of Letters'Patent No. 9,279, dated September2l, 18532.v

To all waomr't may concern:

Beit known that I, MosEs G. FARMER, of Salem, in the county of Essex andState of Massachusetts, have invented a certain new and useful`Improvement in vthe Construction ofGalvanic Clocks; and I do herebydeclare that the same is fully described and represented vin thefollowing specicationand the accom- ;panying drawings, letters, gures,and references thereof.

0f the said drawings, Figure 1 is a top view of my galvanic or electricclockimprovement. Fig. 2 is arear elevation of it. Fig. 3 is a central,vertical, and transverse section of it. Fig. 4 is a side view, givingthe relative position of thependulum-impulse spring, pallet, armature,and magnet.

In Figs. 1, 2, and 3, A represents a horizontal yboard to which isaffixed the upright board or partition A. To one side of this partitionor hoard is attached the metallic plate p, which supports the bearin gsof the armature, and also supports the fork Q, which limits the motionof the armature-B.

q is a metallic plate attached to the partition A. To this plate isaixed the arm q', which projects therefrom and supports the impulsepallet or spring s. E is another metallic plate secured to the partitionA. To this plate E is affixed an arm, E', from which project upwardknife edges or points a2 a2, upon which is suspended the pendulum.

Thecross-barH of the pendulum has agroove on its under side, which restson the points a2 a2, projecting upward from the arm E. The arm E' isforked, as seen at b2 b2. The perpendicularrod K' of the pendulum hangsbetween the prongs b2 b2 of the fork E'. The plates E and q are on thesame side of the partition A, andare insulated from each other, (theynot being allowed to touch each other',) as also from the plate p, whichis the other side ot the partition A.

M is the electro-magnet, conned above the partition A by the cross-pieceC and screw S, which enters the plate p or a projection from it. One endof the wire of the electro-magnet M is in contact with the plate p, andthus'is in connection with the armature lever or arm 01y andlifting-pallet f. rlhe other end ot the coil of -wire is. connected withthe screw-cup B'. The.'

cup N. is connected by a wire, tr, with the plate g, which, by means ofthe arm'q, supports the impulse spring or pallet s.

The armature B is attached to its axis or turning-axle p by the arm a.The pendulum' downward from the "middle of the bar 7c Upon the ends ofthe bar 7cl k are bobs F F'. There is a bob, F, on the lower end of thearm k.- a is an arm attached to the axis p', Fig. 3, of the armature B.

f is a pin (called the lifting-pallet) projecting from the arm a. Itsvuse is to lift or bend the impulse pallet or spring. s. The pin b thatprojects from the arm 4le of the pendulum is used to`lift the impulse'spring or pallet s from the lifting-palletf. AIt also receives theimpulse-'from the impulse-pallet.

D D represent the poles of the magnet, with inclined faces.

Suppose a suitable electric battery or gcnerator of electricity to beconnected with the screw-cups P and N. stances, the impulse-pallet s isin contact with the lifting-pallet f, the magnet M will become chargedand attract the armature B and draw it toward it, at the same timelifting the arm a, the motion ot` which and its lifting-pallet f willlift the im pulse-pallet s. If now the bob F be depressed a sufficientdistance and released on lthe return of it, the pin b will lift" theimpulsepallet s from the lifting-pallet f, and thus break the circuitand discharge the magnet M. The armature B will then instantly recede orfall away from the magnet, so as to leave the impulse pallet or spring sfree to act 0nthe pinY b and impel the bob F of the pendulum downward,which it will do until it (the said impulse` pallet s) comes intocontact with the liftingpallet f, when the circuit will be againrestored, the magnet M again charged, and the impulse spring or palletagain lifted by the motion of thelifting-pallet and armature. Thependulum still goes on until it has completed its vibration, when itwill return and the same action will again take place. Thus the pendulumwill If, under such circum-l receive equal aud constant impulses, whilethe battery retains sufficient power to raise the armature up to theextent of its motion, and no increase of battery power beyond that pointought to affect the times ot vibration of the pendulum.

It is evident that the motion of the pendulum may be controlled by theforce of a spring instead of the force ot' gravity. lt will also beevident that if the impulse pallet or spring s were properly adjustedbelow the lifting-pallet f and the pin I1, and if the end of the Wire ofthe electro-magnet which is now connected with 1 the plate p werecharged and connected with the plate E (and,ofco`urse, with thependulum) when the magnet is not charged, the weight of the armature B,acting by means of the liftingpallet f, would depress the impulse palletor spring s, and if the bob F were depressed till the pin b came intocontact with the impulsepallet s, the circuit would be complete, themagnet M charged, the liftingpallet f raised by the motion of thearmature B, and the impulsepallet s left free to act upon the pin b andimpel the bob F ofthe pendulum upward until the impulsepallet s cameinto contact with the lifting (or, in this case, depressing) pallet f,when the motion of s would stop; but the pendulum would continue onward,thus breaking the circuit between the pin b and pallet jl ThemagnetMbeingdischarged,thearmaturewould recede depressing theimpulse-pallet s, and it be prepared for another impulse when thependulum returns. Thus the motion of the pendulum would be kept up whilethe strength of the battery was sutcient to entirely raise the armature.

It is well known that inv electric clocks the armature ot' the magnet isconnected to the wheelwork in some manner or by some machinery by whichits periodical movements may be made to impel the clock-work. Thisconnecting machinery is usually an impe-lling or draw pawl acting ou arachet-wheel fixed on the axle of the second-hand of the clock, or onthe axle of some wheel that aids in giving motion toA such axle of thesecond-hand.

As -my improvement has no reference to such means of connecting thearmature of the magnet and the wheel-work of the clock, I have notdeemed it necessary to represent such in the drawings. Nor do I wish itunderstood that my improvement is to be confined to a pendulum,constructed in manner or having the form as described, as it may beapplied to a pendulum otherwise made.

What I claim as my improvement or invenf tion is- The combination oftheimpulse-spring s and the pallets f and b, respectively connected withthe armature of the magnet and the pendulum, and made to operatetogether and to make the pendulum operate or impart impulse to it,substantially as described.

In testimony whereof I have hereto set my si gnature this ,10th day ofMay, A. D. 1852.

MOSES G. FARMER,

Witnesses:

R. H. EDDY, G. W. GUTLER.

